View Full Version : Continents.


Mucker
08-22-03, 07:29 PM
This should have really gone in Earth science, but I don't know how many people go into there and I wanted quite a few thoughts.

So, with the gradual shift of continents, we should be able to see, roughly, where the continents have come [Ifrom[/I], and if indeed the big bang has played a part in creation. Looking at the attachment do we think it is possible that land was created as one large continent, as slowly drifted apart?

Pay particular attention to corresponding indents from separate continents. Remember however that these maps are only human estimates, and that they were probably drawn to correspond with existing human thoughts about the world. Satellite images may produce more useful information.

Any thoughts?? :)

Killjoy
08-22-03, 11:34 PM
I thought it was already proven that what you're describing was what actually transpired.
The name for the "supercontinent" that I'm aware of is Pangea. I'm not familiar with any theory concerning the cause of its breakup, though.

,I don't see how whether this is fact or not has any impact on the Big Bang theory of the origin of the universe...

So far as I know on that front...
Cosmic background radiation presumed to be the remnant energy of the actual big bang explosion has been detected.

Professor George Smoot led the research...

http://aether.lbl.gov/

The question this discovery has not answered is whether or not there follows a "big crunch" at a theoretical end of the universe. Apparently the question hinges on whether there exists sufficient "nonluminous" or "dark" matter to make the math work.

Mucker
08-23-03, 12:13 AM
DIRBE has mapped the absolute sky... How??! The 'sky' is a big place.

Killjoy
08-23-03, 01:00 AM
"DIRBE has mapped the absolute sky brightness in 10 wavelength bands ranging from 1.25 microns to 240 microns. These data contain the signal from the cosmic infrared background and the foreground emissions from extragalactic sources, our Galaxy, and dust and other sources in our solar system."

It's not stating that the thing has mapped "the absolute sky" as in the "ultimate" or final map of the entire "heavens", but that the thing has measured the absolute brightness of the sky within a certain range of wavelengths.

one_raven
08-23-03, 01:43 AM
Originally posted by Mucker
So, with the gradual shift of continents, we should be able to see, roughly, where the continents have come [Ifrom[/I], and if indeed the big bang has played a part in creation.

As Killjoy said, the supercontinent that theoretically broke apart is commonly known as Pangea.
I believe the theory is called "Continental Drift Theory".

I am curious too, what this has to do with the Big Bang Theory.

Mucker
08-23-03, 01:46 AM
Okay Killjoy. But from one point in space?? Wouldn't a different reading would be found from a different point in space?!

Killjoy
08-23-03, 02:02 AM
...But, as I understand the info from the site, foreground radiation would be different because of the proximity of different celestial sources of the wavelengths in question.
Background intensities would remain more or less constant no matter where they were "viewed" from because of the nature of the phenomenon of cosmic background radiation. I imagine the picture might appear different in the manner that a sculpture would viewed from different angles, but with the background "image" it's merely 2 views of the same thing.

The thing that I have always wondered about concerning this was how they managed to detect this apparently faint infrared source amid all the sources there must be in any given "slice" of the sky, let alone the whole universe...